Lignite and Dunite

Lignite

Dunite

Dunite and Lignite

Definition

Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat

Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine

History

Origin

France

New Zealand

Discoverer

Unknown

Ferdinand von Hochstetter

Etymology

From French, Latin lignum wood + -ite1

From the name of Dun Mountain, New Zealand, + -ite1

Class

Sedimentary Rocks

Igneous Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Not Applicable

Plutonic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Amorphous, Glassy

Phaneritic

Color

Black, Brown, Dark Brown, Grey, Light to Dark Grey

Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Acid Resistant

Appearance

Veined or Pebbled

Rough and Shiny

Uses

Architecture

Interior Uses

Not Yet Used

Decorative Aggregates, Interior Decoration

Exterior Uses

Not Yet Used

As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Not Yet Used

Curbing

Industry

Construction Industry

for Road Aggregate, Steel Production

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

Medical Industry

Not Yet Used

Antiquity Uses

Not Yet Used

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Electricity Generation

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

Types

Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite

Not Available

Features

Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel

Constitutes upper part of the Earth's mantle, Generally rough to touch, Host rock for Diamond, Is one of the oldest rock

Archaeological Significance

Monuments

Not Yet Used

Used

Famous Monuments

Not Applicable

Data Not Available

Sculpture

Not Yet Used

Used

Famous Sculptures

Not Applicable

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Not Yet Used

Used

Fossils

Present

Absent

Formation

Coal formation takes place due to accumulation of plant debris in a swamp environment. The Coal formation process continues, as peat turns into lignite brown or black coal at increasing heat and pressure.

Dunite is a plutonic ultramafic igneous rock consisting almost m olivine. It can be formed in two ways.

Composition

Mineral Content

Not Available

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

Compound Content

Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

Ca, CaO, Fe, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Not Applicable

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Coastal Erosion, Glacier Erosion, Water Erosion

Properties

Physical Properties

Hardness

3.5-4

Grain Size

Medium to Fine Coarse Grained

Coarse Grained

Fracture

Conchoidal

Irregular

Streak

Black

White

Porosity

Highly Porous

Less Porous

Luster

Dull to Vitreous to Submetallic

Shiny

Compressive Strength

Not Available

107.55 N/mm²

Cleavage

Non-Existent

Imperfect

Toughness

Not Available

2.1

Specific Gravity

1.1-1.4

3-3.01

Transparency

Opaque

Translucent to Opaque

Density

800-801 g/cm³

2.84-2.85 g/cm³

Thermal Properties

Specific Heat Capacity

1.26 kJ/Kg K

1.25 kJ/Kg K

Resistance

Heat Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam

China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey

Africa

Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania

Morocco, South Africa

Europe

Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom

Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland, Venezuela

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, Mexico, USA

Canada, USA

South America

Brazil, Chile, Colombia, Venezuela

Argentina, Brazil, Colombia, Ecuador, Venezuela

Deposits in Oceania Continent

Australia

New South Wales, Queensland, Victoria

New Zealand, Western Australia

Summary >>

<< Reserves

All about Lignite and Dunite Properties

Know all about Lignite and Dunite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Dunite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Dunite is Phaneritic. Lignite appears Veined or Pebbled and Dunite appears Rough and Shiny. The luster of Lignite is dull to vitreous to submetallic while that of Dunite is shiny. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Dunite is available in dark greenish - grey colors. The commercial uses of Lignite are electricity generation and that of Dunite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.